Coming back on an external link

Hi all,
I install in-app-browser and I open a new window from my app to load an external link but it doesn’t come back into my app… why?
I just do it

<a class="button button-icon icon ion-social-facebook" onclick="'','_system','location=no'); return false;"></a>


so the in app browser opens and if you click on “done”, what happens?

i use the plugin also, but with different params, '_blank', 'location=yes');
// no return false


its doesnt work…
because if I press button back on my phone it doesnt return the back page